Didn't work for me. I tried almost a dozen stores that should be open, (it's almost 4PM GMT right now) and I couldn't find a single terminal to chat on. Good idea, but it needs some fine tuning.
The account names used on the computers at Apple stores apparently follow a pattern, the script using that pattern creates all of the accounts possible at a store, then using an API available from AOL grabs the current status of that "username", and their user icon, displaying online or offline status.